Camille's average on her 6 math tests this marking period is 75. Fortunately for Camille, her teacher drops each student's lowest grade, and this raises her average to 85. What was her lowest grade?
(A) 20
(B) 25
(C) 30
(D) 40
(E) 50
Solution for GRE Math Problem 55:
The average of a, b, c, d, e,f, and g equals to their sum, divided by their quantity. So,
Answer: A
Posts
you got the wrong answer, its B) 25. The simple solution is: (85(5)+X)/6=75. If you break it down: 85(5)=425 and 75(6)=450, so 425+X=450, X=25.
ReplyDeleteI was helping a friend study for the GRE, feel ashamed that your site cannot even post proper answers.
Thank you very much, I don't know wht I divided everything by 7. Your solion is correct, of course.
ReplyDeleteOh, I remembered: this is the problem 56, and the solution is to the problem 55. The solution to this problem is in the next post, next post and the answer is 25.
ReplyDeleteBeing attentive is one of the most useful skills while solving GRE problems.